Question

The largest difference between Mars's northern and southern hemispheres is that:

A: the southern is much darker, with large mare-like basaltic lava flows.
B: the northern is higher overall, despite some high volcanoes in the south.
C: the northern has all the outflows and must have been much hotter.
D: the southern appears older, with more impact craters.
E: the southern has a polar cap, but none ever forms in the north.

Answer 1

The largest difference between Mars's northern and southern hemispheres is that the southern hemisphere appears older, with more impact craters, while the southern hemisphere has a polar cap, but none ever forms in the north.

Step-by-step explanation:

The largest difference between Mars's northern and southern hemispheres is that the southern hemisphere appears older, with more impact craters, while the southern hemisphere has a polar cap, but none ever forms in the north.